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Showing results 1 to 20 of 42
Trading Places: Redox Reactions
Source Institutions
Visitors add drops of copper sulfate solution onto a steel nail. They observe the nail change color from silver to brown as the copper plates onto the nail.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-490.jpg?itok=c9Em4Unp)
Invisible Ink Demonstration
Source Institutions
In this chemistry demonstration, learners will discover that phenolphthalein is a chemical that displays different colors depending on the acidity or basicity of the environment.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-484.jpg?itok=sCXhvHtG)
The Power of Words
Source Institutions
This simple, yet surprising physics demonstration challenges preconceptions about forces, and demonstrates the strength of atmospheric pressure.
Currently Working: Testing Conductivity
Source Institutions
Visitors test solutions of water, sugar, salt, and hydrochloric acid and the solids salt and sugar. They clip leads from the hand generator to wires immersed in each substance.
Forwards and Backwards: pH and Indicators
Source Institutions
Visitors prepare six solutions combining vinegar and ammonia that range incrementally from acid (all vinegar) to base (all ammonia).
Pencil Drop
Source Institutions
In this demonstration, learners observe as a bottle is placed on a table with wooden hoop balanced on top and a pencil balanced on top of the hoop.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-478.png?itok=4BAU6J18)
Cartesian Diver
Source Institutions
In this demonstration, learners observe the effects of density and pressure. A "diver" constructed out of a piece of straw and Blu-Tack will bob inside a bottle filled with water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-479.png?itok=OsNzMBdR)
Amazing Marshmallows
Source Institutions
In this demonstration, learners observe the effects of air pressure. They will watch as marshmallows inside a bottle expand as a vacuum pump removes air from the bottle.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-492.jpg?itok=xb7lbWG1)
Cat's Meow
Source Institutions
In this chemistry activity, learners are asked to form a hypothesis about the behavior of milk as household detergents act upon it.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-485.png?itok=guP2shnY)
Waterproof Hanky
Source Institutions
In this physics demonstration, learners will be surprised when a handkerchief holds water in an upside-down glass.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-581.jpg?itok=VxkAzCkQ)
Vanishing Rods
Source Institutions
This is a quick activity/demonstration that introduces learners to the concept of index of refraction. Learners place stirring rods in a jar of water and notice they can see them clearly.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-473.png?itok=41UeBPv4)
Egg-Citing Physics
Source Institutions
In this demonstration about momentum, use physics to distinguish between a hard-boiled egg and a raw egg without cracking them open.
Yeast Balloons
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Visitors observe a bottle with a balloon attached around the mouth. The bottle contains a solution of yeast, sugar, and water.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-472.png?itok=LeKZ-TAQ)
One In The Hand
Source Institutions
In this physics demonstration, learners are challenged to break a raw egg just by squeezing it. Learners will be shocked by their inability to complete the deceivingly simple challenge.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-513.jpg?itok=jeXuXg4C)
Experiencing Parallax With Your Thumb
Source Institutions
In this activity, learners investigate parallax, a method used to measure distances to stars and planets in the solar system.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-149.gif?itok=NXj_YIQg)
A Pressing Engagement
Source Institutions
In this quick and easy activity and/or demonstration, learners illustrate the effect of the weight of air over our heads.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-003-371.jpg?itok=G0NIzJmW)
Pop Rockets
Source Institutions
Learners place water and part of an antacid tablet in a film canister. The reaction creates a gas reaction that launches the film canister like a rocket.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-002-349.jpg?itok=PVhwtrUk)
X-Ray Vision?
Source Institutions
In this activity (13th on the page), learners complete a simple illusion trick to see through their own hand.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-001-024.jpg?itok=fviBeYjW)
Pósteres Sobre Animales y Matemáticas
Source Institutions
Exponga estos pósteres en el salón o déjelos donde los chicos los puedan explorar. Los chicos buscan las respuestas en libros de consulta o en línea.
![](/sites/default/files/styles/square_100/public/resource_images/smile-000-000-004-680.jpg?itok=6xlyPmXd)
Magnetic Lines of Force
Source Institutions
With a magnet, iron fillings, and a bottle, you can create a cool demonstration about magnetic lines of force: the fillings will arrange themselves within the magnet's magnetic field.